update : 2015.11.03
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Substracts a portion of the buffer data
EventBuffer
PHP Manual

EventBuffer::substr

(PECL event >= 1.6.0)

EventBuffer::substr — Substracts a portion of the buffer data

설명

public string EventBuffer::substr ( int $start [, int $length ] )

Substracts up to length bytes of the buffer data beginning at start position.

인수

start

The start position of data to be substracted.

length

Maximum number of bytes to substract.

반환값

Returns the data substracted as a string on success, or FALSE on failure.

참고

EventBuffer
PHP Manual